Loans - Delinquency Ratio for Consumer Loan (Detail) - USD ($) $ in Millions		Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Total	[1]	$ 57,945	$ 59,380
Loans carried at lower of amortized cost or fair value of collateral less cost to sell		57	60
Consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		1,212	2,975
One year prior to current year		2,898	4,302
Two years prior to current year		4,212	2,982
Three years prior to current year		2,902	1,361
Four years prior to current year		1,315	764
Prior		5,389	4,954
Revolving Loans		206	225
Total		18,134	17,563
Loans in process of foreclosure		24	21
Consumer loans | Residential mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		1,183	2,887
One year prior to current year		2,814	4,280
Two years prior to current year		4,193	2,949
Three years prior to current year		2,870	1,323
Four years prior to current year		1,283	751
Prior		5,109	4,648
Revolving Loans		0	0
Total		17,452	16,838
Consumer loans | Home equity mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		29	74
One year prior to current year		71	12
Two years prior to current year		11	24
Three years prior to current year		24	32
Four years prior to current year		28	13
Prior		201	215
Revolving Loans		0	0
Total		364	370
Consumer loans | Credit cards
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0	0
One year prior to current year		0	0
Two years prior to current year		0	0
Three years prior to current year		0	0
Four years prior to current year		0	0
Prior		0	0
Revolving Loans		197	213
Total		197	213
Consumer loans | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0	14
One year prior to current year		13	10
Two years prior to current year		8	9
Three years prior to current year		8	6
Four years prior to current year		4	0
Prior		79	91
Revolving Loans		9	12
Total		121	142
Consumer loans | Summary of Two Months and Over Contractual Delinquency
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0	6
One year prior to current year		7	4
Two years prior to current year		3	8
Three years prior to current year		10	16
Four years prior to current year		2	10
Prior		105	102
Revolving Loans		4	4
Total		131	150
Consumer loans | Summary of Two Months and Over Contractual Delinquency | Residential mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0	6
One year prior to current year		7	4
Two years prior to current year		3	8
Three years prior to current year		10	16
Four years prior to current year		2	10
Prior		100	97
Revolving Loans		0	0
Total		122	141
Consumer loans | Summary of Two Months and Over Contractual Delinquency | Home equity mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0	0
One year prior to current year		0	0
Two years prior to current year		0	0
Three years prior to current year		0	0
Four years prior to current year		0	0
Prior		3	3
Revolving Loans		0	0
Total		3	3
Consumer loans | Summary of Two Months and Over Contractual Delinquency | Credit cards
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0	0
One year prior to current year		0	0
Two years prior to current year		0	0
Three years prior to current year		0	0
Four years prior to current year		0	0
Prior		0	0
Revolving Loans		4	3
Total		4	3
Consumer loans | Summary of Two Months and Over Contractual Delinquency | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0	0
One year prior to current year		0	0
Two years prior to current year		0	0
Three years prior to current year		0	0
Four years prior to current year		0	0
Prior		2	2
Revolving Loans		0	1
Total		$ 2	$ 3

[1] The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at June 30, 2023 and December 31, 2022. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 17, "Variable Interest Entities," for additional information. June 30, 2023December 31, 2022(in millions)AssetsLoans, net$186 $162 Other assets40 44 Total assets$226 $206 LiabilitiesInterest, taxes and other liabilities$35 $22 Total liabilities$35 $22